LIST OF CONTENTS January (Vol. 64, No. 1) Volume 64, Number | January 2000 Editorials MicHaeL J. DRAKE: Changing of the guard FRANK A. PoposeK: What’s new and what's not Articles ANTONIO SIMONETTI, CLEMENT GaRIEPY, and JEAN CARIGNAN: Pb and Sr isotopic compositions of snowpack from Québec, ¢ anada Inferences on the sources and deposition budgets of atmospheric heavy metals JOHN S. RODEN, GUANGHU! LIN, and JAMES R. EHLERINGER: A mechanistic model for interpretation of hydrogen and oxygen isotope ratios in tree-ring cellulose MARK PAGANI, KATHERINE H. FREEMAN, and MicHAgL A. ARTHUR: Isotop|e analyses of ar and total organic carbon trom Miocene sediments JEROEN D. Fitius, Davip G. Lumspon, JOHANNES C. L. MEEus 4. and Wi 1 N MSDUK: Adsorption of fulvic acid on goethite A. R. Hocn, M. M. Reppy, and G. R. AIKEN: Calcite crystal growth inhibition by humic substances with emphasis on l hydrophobic acids from the Florida Everglades KYOUNGWON MIN, ROLAND MunpiL, PAUL R. RENNE, and KENNETH R. Lupw \ test for systematic errors in “Ar nology through comparison with U/Pb analysis of a 1.1-Ga rhyolite M. Kein, H.-G. Stoscu, H. A. Seck, and N. Suimizu: Experimental partitioning of high field stren zth and rare earth elements between clinopyroxene and garnet in andesitic to tonalitic systems PeTeR DeINes and STEPHEN E. HAGGERTY: Small-scale oxygen isotope variations and petrochemistry of ultradeep (>300 km) and transition zone xenoliths W. L. Grirrin, N. J. PEARSON, E. BeLousova, S. E. Jackson, E. VAN ACHTERBERGH, SUZANNE Y. O'REILLY, and S. R. SHee: The Hf isotope composition of cratonic mantle: LAM-MC-ICPMS analysis of zircon megacrysts in kimberlites CyrRENA A. GoopricH and JEREMY S. DELANEY: Fe/Mg—Fe/Mn relations of meteorites and primary heterogeneity of primitive achondrite parent bodies January (Vol. 64, No. 2) Volume 64, Number 2 January 2000 Articles T. W. D. Epwarps, W. Grar, P. TRIMBORN, W. STICHLER, J. Lipp, and H. D. Payer: 5'°C response surface resolves humidity and temperature signals in trees M. TAILLEFERT, C.-P. LIENEMANN, J.-F. GAILLARD, and D. Perret: Speciation, reactivity, and cycling of Fe and Pb in a meromictic lake V. A. Sinitsyn, S. U. Asa, D. A. KuLik, and S. A. Woop: Acid/base surface chemistry and sorption of some lanthanides on K*-saturated Marblehead illite: I. Results of an experimental investigation D. A. Kuxik, S. U. Aja, V. A. Sinitsyn, and S. A. Woop: Acid—base surface chemistry and sorption of some lanthanides on K~-saturated Marblehead illite: II. A multisite—surface complexation modeling C. M. Pina, L. FeRNANDEZ-Diaz, M. Prieto, and A. Putnis: In situ atomic force microscope observations of a dissolution crystallisation reaction: The phosgenite—cerussite transformation K. Suzuki, H. Kaci, M. NARA, B. TAKANO, and Y. Nozaki: Experimental alteration of molybdenite: Evaluation of the Re—Os system, infrared spectroscopic profile and polytype P. AHARON and B. Fu: Microbial sulfate reduction rates and sulfur and oxygen isotope fractionations at oil and gas seeps in deepwater Gulf of Mexico B. C. Bostick, S. FENporF, and M. Fenporr: Disulfide disproportionation and CdS formation upon cadmium sorption on FeS, H. M. STEELE, K. WriGHT, M. A. NyGren, and J. H. HILvier: Interactions of the (001) surface of muscovite with Cu(ID, Zn(II), and Cd(II): A computer simulation study P. R. Ho_mes and F. K. CRUNDWELL: The kinetics of the oxidation of pyrite by ferric ions and dissolved oxygen: An electrochemical M. Rapke, S. P. VRiEND, and L. R. RAMANAMPISOA: Alkyldibenzofurans in terrestrial rocks: Influence of organic facies and maturation J. A. Barrat, J. Boutkcur, J. J. TierceLin, and M. Lesourp: Strontium isotopes and rare-earth element hydrothermal carbonate deposits from Lake Tanganyika, East Africa J. S. Ray and R. RAMEsH: Rayleigh fractionation of stable isotopes from a multicomponent source J. M. BRENAN and N. C. CaciAGit: Fe—Ni exchange between olivine and sulphide liquid: Implications for oxygen barometry in sulphide-saturated magmas M. A. SEPHTON, C. T. PILLINGER, and I. GiLMouR: Aromatic moieties in meteoritic macromolecular materials: Analyses by hydrous saa cares Caer pyrolysis and 6°°C of individual compounds S. PizzARELLo and J. R. CRONIN: Non-racemic amino acids in the Murray and Murchison meteorites D. S. Eset and L. GrossMAN: Condensation in dust-enriched systems Announcements Papers to Appear in Forthcoming Issues February (Vol. 64, No. 3) Volume 64, Number 3 February 2000 Articles Martin Novak, JAMES W. KIRCHNER, HANA GROSCHEOVA, MIROSLAV HAVEL, Jiki CERNY, RADOVAN KREJCi, and FRANTISEK BUZEK Sulfur isotope dynamics in two Central European watersheds affected by high atmospheric deposition of SO, THOMAS COLE, GIOVANNI BIDOGLIO, MAGDALINI SOuPIONI, MARK O’GorMAN, and Nei Gipson: Diffusion mechanisms of multiple strontium species in clay ESTELLE F. Rose, MARc CHAuSSIDON, and CHRISTIAN FRANCE-LANORD: Fractionation of Boron isotopes during erosion processes The example of Himalayan rivers JEAN-PIERRE GIRARD, PHILIPPE FREYSSINET, and GILLES CHAZoT: Unraveling climatic changes from intraprofile variation in oxygen and hydrogen isotopic composition of goethite and kaolinite in laterites: An integrated study from Yaou, French Guiana Timotuy W. Lyons, JAMes J. LUEPKE, MADELINE E. SCHREIBER, and GERALD A. ZigEG: Sulfur geochemical constraints on Mesopro- terozoic restricted marine deposition: Lower Belt Supergroup, northwestern United States ANDREY V. PLYASUNOV and Everett L. SHock: Thermodynamic functions of hydration of hydrocarbons at 298.15 K and 0.1 MPa HANS-MARTIN SCHULZ, ANNE SCHONER, and Kay-CurisTIAN Emeis: Long-chain alkenone patterns in the Baltic Sea— an ocean-freshwater transition PAMELA J. MurPHy, GARY STEVENS, and MANnpy S. LAGRANGE: The effects of temperature and pressure on gold—chloride speciation in hydrothermal fluids: A Raman spectroscopic study ANDREY V. PLYASUNOV, JOHN P. O’CONNELL, and RoBert H. Woon: Infinite dilution partial molar properties of aqueous solutions of nonelectrolytes. I. Equations for partial molar volumes at infinite dilution and standard thermodynamic functions of hydration of volatile nonelectrolytes over wide ranges of conditions B. C. Scumipt, T. RieMeR, S. C. KOHN, H. BEHRENS, and R. Dupree: Different water solubility mechanisms in hydrous glasses along the Qz-Ab Join: Evidence from NMR Spectroscopy Russet O. Cotson, Mary C. Coison, Marcia K. B. NERMOE, ANGELA M. FLODEN, and TANYA R. HENDRICKSON: Effects of aluminum on Cr dimerization in silicate melts and implications for Cr partitioning and redox equilibria K. J. MATHEW, R. L. PALMA, K. Marti, and B. LAviELLE: Isotopic signatures and origin of nitrogen in ITE and IVA iron meteorites Yayot N. Miura and Naomi Suciura: Martian atmosphere-like nitrogen in the orthopyroxenite ALH84001 Comment and Reply MAHENDRA P. VERMA: Comment on “Experimental determination of carbon isotope equilibrium fractionation between dissolved carbonate and carbon dioxide” S. Haas, J. SZARAN, and H. Niezcopa: Reply to the Comment by M. P. Verma on “Experimental determination of carbon isotope equilibrium fractionation between dissolved carbonate and carbon dioxide’ Errata Errata to GeorGeE W. Lutuer, III, STEPHEN M. THEBERGE, and Davip T. Rickarp (1999), “Evidence for aqueous clusters as intermediates during zinc sulfide formation”, Geochimica et Cosmochimica Acta 63, 3159-3169 Announcement Papers To Appear In Forthcoming Issues February (Vol. 64, No. 4) Volume 64, Number 4 February 2000 Articles J. K. AGGARWAL, M. R. PALMer, T. D. BULLEN, S. ARNORSSON, and K. V. RAGN DOTTIR: The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems Laura J. LIERMANN, BIRGITTA E. KALINOWSKI, SUSAN L. BRANTLEY, and James G. Ferry: Role of bacterial siderophores in dissolution of hornblende ISABEL PEREZ, IGNASI CASAS, MARIA Martin, and Jorpi BRUNO: The thermodynamics < *tics of uranophane dissolution in bicarbonate test solutions NATHAN YEE, JEREMY B. Fein, and CHRISTOPHER J. DAUGHNEY: Experimental study of the pH, ionic strength, and reversibility behavior of bacteria—mineral adsorption 609 M. PAuL FiELp and RoBert M. SHERRELL: Dissolved and particulate Fe in a hydrothermal plume at 9°45'N, East Pacific Rise: Slow Fe (II) oxidation kinetics in Pacific plumes GEOFFREY WHEAT and MicHaeL J. Mortt_: Composition of pore and spring waters from Baby Bare: Global implications of geochemical fluxes from a ridge flank hydrothermal system JUAN CARLOS MEDINA, STEVEN J. BUTALA, CALVIN H. Bat reactions leading to coalbed gas formation LAODONG Guo and Peter H. SANTscui: Sedimentary sources of old hi margin benthic nepheloid layet SopHiE Ris, MICHEL CONDOMINES, and OLGEIR SIGMARSSON ta and Bz corporation carbonates: Implications for ~“°Ra-Ba dating of impure M. Grecoire, J. P.L oranp, S. Y. O'REILLY, and J. Y. Co rmalcolite-bearing, Ti-rich metasomatic assembinl haargzbeurgsit i xenoliths from the Kerguelen Islands: Implications for the oceanic mantle budget of high-field strength elements E. TAKAZAWA, F. A. Frey, N. Suimizu, and M. Opata: Whole rock compositional variations in an upper mantle peridotite (Horoman Hokkaido, Japan): Are they consistent with a partial melting process L. H. JOHNSON, R. BurGess, G. TURNER, H. J. MILLEDGE, and J Hat Noble gas and halogen geochemistry of mantle fluids Comparison of African and Canadian diamonds JoHN M. EILer, NAMi KITCHEN, and THOM A. RAHN: Experimental constraints on the stable-isotope systematics of CO, ice/vapor systems and relevance to the study of Mars Awards David J. Des Marais: Introduction of John M. Hayes for the 1997 Alfred E. Treibs Award JoHN M. Hayes: Acceptance of the 1997 Alfred E. Treibs Award Wayne C. (PAT) SHANKS III: Citation for presentation of the 1999 Goldschmidt Medalist to James L. Bischoff James L. BiscHorF: V. M. Goldschmidt Award Acceptance Speech G. J. WASSERBURG: Citation for presentation of the 1999 C. C. Patterson Award to R. Lawrence Edwards R. LAWRENCE Epwarbs: C. C. Patterson Award Acceptance Speech DONALD L. SPARKS: Citation for presentation of the 1999 F. W. Clarke Award to André M. Scheidegger ANDRE M. SCHEIDEGGER: F. W. Clarke Award Acceptance Speech Announcements PAPERS TO APPEAR IN FORTHCOMING ISSUES March (Vol. 64, No. 5) Volume 64, Number 5 March 2000 Articles ELIZABETH A. WEBB and FREDERICK J. LONGSTAFFE: The oxygen isotopic compositions of silica phytoliths and plant water in grasses: Implications for the study of paleoclimate José Luis MoGoLLON, ALBERTO PéreEz-Diaz, and SALVADOR Lo Monaco: The effects of ion identity and ionic strength on the dissolution rate of a gibbsitic bauxite Jopi J. Rosso and J. DoNALD Rimstipt: A high resolution study of forsterite dissolution rates ByORN OHLANDER, JOHAN INGRI, MAGNUS LaND, and HANs SCHOBERG: Change of Sm-Nd isotope composition during weathering of MICHAEL SCHLUTER, EBERHARD SAUTER, HANS-PETER HANSEN, and Erwin Sugss: Seasonal variations of bioirrigation in coastal sediments: Modelling of field data E. E. Martin and B. A. HALey: Fossil fish teeth as proxies for seawater Sr and Nd isotopes VENIAMIN B. POLYAKOV and SERGEY D. MINEEv: The use of Méssbauer spectroscopy in stable isotope geochemistry SHANGDE Luo, TEH-LUNG Ku, ROBERT ROBACK, MICHAEL MurreLL, and Travis L. McLinc: In-situ radionuclide transport and preferential groundwater flows at INEEL (Idaho): Decay-series disequilibrium studies QIANG ZENG, HANNA NEKVASIL, and CLarE P. Grey: In support of a depolymerization model for water in sodium aluminosilicate glasses: Information from NMR spectroscopy HENRIK FossinG, TimoTHY G. FERDELMAN, and PETER BERG: Sulfate reduction and methane oxidation in continental margin sediments influenced by irrigation (South-East Atlantic off Namibia) ARIA AMIRBAHMAN, MICHAEL GFELLER, and GERHARD Furrer: Kinetics and mechanism of ligand-promoted decomposition of the Keggin Al,, polymer Davip R. Cote: Isotopic exchange in mineral-fluid systems. IV. The crystal chemical controls on oxygen isotope exchange rates in carbonate-H,O and layer silicate-H,O systems STEPHEN F. FoLtey, MATTHIAS G. BARTH, and GeorGe A. JENNER: Rutile/melt partition coefficients for trace elements and an assessment of the influence of rutile on the trace element characteristics of subduction zone magmas KaZuHiTo Ozawa and Hiroko NaGaAuara: Kinetics of diffusion-controlled evaporation of Fe-Mg olivine: Experimental study and implication for stability of Fe-rich olivine in the solar nebula Book Review CHRISTIAN KOEBERL: Book Review: Encyclopedia of Geochemistry Errata PIERRE-J. GAUTHIER, MICHEL CONDOMINES, and TAHAR HAMMouDa: Erratum to “An experimental investigation of radon diffus an anhydrous andesitic melt at atmospheric pressure: Implications for radon degassing from erupting mag Cosmochim. Acta (1999), 63-—5, 645-656 March (Vol. 64, No. 6) Volume 64, Number 6 March 2000 Articles M. PENNISI, W . AN, S. TONARINI, A. PENNISI, and P. Nasi ron, St and H isotope geochemistry rroundwat Mt. Etna (Sicily)—hydrologic implications JEFFREY M. HeIkoop, JENNIFER J. DUNN, MICHAEL J. Risk, HENRY P. ScHwArcz, Tep A. Mc Separation of kinetic and metabolic isotope effects in carbon-13 records preserved S. D. Oxtay, P. H. SANTscui, J. E.M oran, and P. SHARMA: The °~“lodine bomb pulse recorded in Mississippi River Delta sedin Results from isotopes of I, Pu, Cs, Pb, and C ERIKA VANDER PUTTEN, FRANK DEHAIRS, Eppy KEPPENS, and WILLY BAEYENS: High resolution distribution of trace calcite shell layer of modern Mytilus edulis: Environmental and biological controls EDWARD R. C. HORNIBROOK, FREDERICK J. LONGSTAFFE, and WILLIAM S. Fyre: Evolution of stable carbon isotope compos methane and carbon dioxide in freshwater wetlands and other anaerobic environments D. J. Burpice, A. Skooc, and K. GARDNER: Dissolved and particulate carbohydrates in contrasting marine sediments PeGcGcy H. Ostrom, MICHAEL SCHALL, HASAND GANDHI, TUN-LI SHEN, PETER V. HAUSCHKA, JOHN R. STRAHLER, and De New strategies for characterizing ancient proteins using matrix-assisted laser desorption ionization mass spectrometry ANTHONY C. WITHERS, SIMON C. KOHN, RICHARD A. BROOKER, and BERNARD J. Wool new method for determining tl properties of high-density H,O using NMR: Results at 1.4—4.0 GPa and 700—1 100°C JameD.s GLEASON, MARK A. MArikos, MARK D. Barton,an d Davip A. JOHNSON: Neodymium isotopic sources and mobility in hydrothermal Fe oxide (Fe-P-REE) systems ZHENHAO DUAN, NANCY M@LLER, and JoHN H. Weare: Accurate prediction of the thermodynamic pt H,0-CO,-—CH,—N, up to 2000 K and 100 kbar from a corresponding states/one fluid equation of SHUGUANG LI, Emit JAGoutz, YizHi CHEN, and QIULI Nd and Rb-Sr isotopic chronology and cooling history pressure metamorphic rocks and their country rocks at Shuanghe in the Dabie Mountains, Central China Haipo Zou: Modeling of trace element fractionation during non al dynamic melting with linear variations distribution coefficients MARK HILYARD, ROGER L. NIELSEN, JAMes S. BEARD, ALBERTO PATINO-Douce, and JAMES BLENCOE: Experimental determination o the partitioning behavior of rare earth and high field strength elements between pargasitic amphibole and natural silicat James P. GREENWOOD, LEE R. RictpuTi, HARRY Y. MCSween, Jr., and LAWREN ,\YLOR: Modified sulfur isotopic compositions of sulfides in the nakhlites and Chassigny WeiBiao Hsu, Gary R. Huss, and G. J. WAsserBURG: Ion probe measurements of Os, Ir, Pt, and Au in individual phases meteorites Announcements Papers to Appear in Forthcoming Issues April (Vol. 64, No. 7) Volume 64, Number 7 April 2000 Articles Britt E. Erickson and Georce R. HELz: Molybdenum (VI) speciation in sulfidic waters: Stability and lability of thiomolybdates 1149 Z. Wana, C. C. AiNsworTH, D. M. Friepricu, P. L. GASSMAN, and A. G. JoLy: Kinetics and mechanism of surface reaction of salicylate on alumina in colloidal aqueous suspension SUZANNE PRESTRUD ANDERSON, JAMES I. DREVER, CAROL D. Frost, and Pete HOLDEN: Chemical weathering in the foreland of a retreating glacier AARON S. TAYLOR, JoeL D. BLumM, ANTONIO C. LasaGA, and IAN N. MACcINNIs: Kinetics of dissolution and Sr release during biotite and phlogopite weathering M. Dina, B. H. W. S. DE Jona, S. J. ROOSENDAAL, and A. VREDENBERG: XPS studies on the electronic structure of bonding between solid and solutes: Adsorption of arsenate, chromate, phosphate, Pb?*, and Zn?* ions on amorphous black ferric oxyhydroxide 1209 P. FeNTER, P. GEISSBUHLER, E. DiMasi, G. SRAJER, L. B. SORENSEN, and N. C. SturcHio: Surface speciation of calcite observed in situ by high-resolution X-ray reflectivity ok 122] R. E. M. RickasBy, M. J. Greaves, and H. ELperFIELD: Cd in planktonic and benthic foraminiferal shells determined by thermal ionisation mass spectrometry 1229 D. Postma and C. A. J. AppELo: Reduction of Mn-oxides by ferrous iron in a flow system: Column experiment and reactive transport modeling PauL F. GREENWOOD, KHALED R. Arouri, and Simon C. GeorGe: Tricyclic terpenoid composition of Tasmanites kerogen as determined by pyrolysis GC-MS FRANK D. Manco: The origin of light hydrocarbons JoHN T. Wasson, GREGORY W. KALLEMEYN, and ALAN E. Ruin: Chondrules in the LEW85332 ungrouped carbonaceous chondrite: Fractionation processes in the solar nebula JIBAMITRA GANGULY and MARILENA StimpFL: Cation ordering in orthopyroxenes from two stony-iron meteorites: Implications for cooling rates and metal-silicate mixing J. M. Saxton, I. C. Lyon, E. CHATZITHEODORIDIS, and G. TURNER: Oxygen isotopic composition of carbonate in the Nakhla meteorite: Implications for the hydrosphere and atmosphere of Mars HirROSHI TAKEDA, DONALD D. BoGarb, DAvip W. MITTLEFEHLDT, and DANIEL H. GARRISON: Mineralogy, petrology, chemistry, and *° Ar-*°Ar and exposure ages of the Caddo County IAB iron: Evidence for early partial melt segregation of a gabbro area rich in plagioclase-diopside Errata JANNE BLICHERT-ToFT, FRANCIS ALBAREDE, MINIK ROSING, ROBERT FREI, and Davip BRIDGWATER: The Nd and Hf isotopic evolution of the mantle through the Archean. Results from the Isua supracrustals, West Greenland, and from the Birimian terranes of West Announcements Papers to Appear in Forthcoming Issues April (Vol. 64, No. 8) Volume 64, Number 8 April 2000 Articles B. E. KaALinowski, L. J. LIERMANN, S. L. BRANTLEY, A. BARNES, and C. G. PANTANO: X-ray photoelectron evidence for bacteria- enhanced dissolution of hornblende JOHN M. ZACHARA, STEVEN C. SMITH, and JAMES K. FREDRICKSON: The effect of biogenic Fe(II) on the stability and sorption of Co(INEDTA?~ to goethite and a subsurface sediment P. A. Maurice, Y.-J. Lee, and L. E. HERsMAN: Dissolution of Al-substituted goethites by an aerobic Pseudomonas mendocina var. bacteria S. L. Kina, P. N. FROELICH, and R. A. JAHNKE: Early diagenesis of germanium in sediments of the Antarctic South Atlantic: In search of the missing Ge sink W. R. Martin, A. P. McNicuoi, and D. C. McCorkLe: The radiocarbon age of calcite dissolving at the sea floor: Estimates from pore water data CHARLES E. Jones, ALEX N. HALLIDAY, Davip K. REA, and RoBert M. Owen: Eolian inputs of lead to the North Pacific Ben G. K. VAN AARSSEN, ROBERT ALEXANDER, and Rosert I. Kaci: Higher plant biomarkers reflect palaeovegetation changes during Jurassic times Marika D. Kok, W. IRENE C. Rupstra, LisETTE ROBERTSON, JOHN K. VOLKMAN, and Jaap S. SINNINGHE DamstTe: Early steroid sulfurisation in surface sediments of a permanently stratified lake (Ace Lake, Antarctica) E. S. ILton, C. O. Moses, and D. R. VEBLEN: Using X-ray photoelectron spectroscopy to discriminate among different sorption sites of Micas: With implications for heterogeneous reduction of chromate at the mica-water interface PANSEOK YANG and Tosy Rivers: Trace element partitioning between coexisting biotite and muscovite from metamorphic rocks Western Labrador: Structural, compositional and thermal controls J. E. GARDNER, M. HILTON, and M. R. CARROLL: Bubble growth in highly viscous silicate melts during continuous decompression from high pressure Announcements PAPERS TO APPEAR IN FORTHCOMING ISSUES May (Vol. 64, No. 9) Volume 64, Number 9 May 2000 Articles MASAHISA Kakiucui: Distribution of isotopic water molecules, H,0, HDO, and D,O, in vapor and liquid phases in pure water and aqueous solution systems KEVIN H. JOHANNESSON and M. Jim HeNpry: Rare earth element geochemistry of groundwaters from a thick till and clay-rich aquitard sequence, Saskatchewan, Canada MICHAEL P. JANZEN, RONALD V. NICHOLSON, and JENO M. SCHARER: Pyrrhotite reaction kinetics: Reaction rates for oxidation by oxygen, ferric iron, and for nonoxidative dissolution May is LABONNE and CLAUDE HILLAIRE—MARCEL: Geochemical gradients within modern and fossil shells of Concholepas conch lepas from Northern Chile: An insight into U-Th systematics and diagenetic/authigenic isotopic imprints in mollusk shells M. C. Durr, D. E. Morris, D. B. HUNTER, and P. M. BertscH: Spectroscopic characterization of uranium in evaporation basin sediments A. SANYAL, M. NUGENT, R. J. REEDER, and J. Buma: Seawater pH control on the boron isotopic composition of calcite: Evidence from inorganic calcite precipitation experiments Grecory E. Wess and Baz S. KAmBer: Rare earth elements in Holocene reefal microbialites: A new shallow seawater proxy GISELA WINCKLER, ROLF KIPFER, WERNER AESCHBACH-HERTIG, REINER Botz, MARK SCHMIDT, STEFFEN SCHULER and REINHOLD BAYEt Sub sea floor boiling of Red Sea Brines: New indication from noble gas data JEFFREY S. SEEWALD, LORRAINE B. EGLINTON and YEA-LING ONG: An experimental study of organic-inorganic interactions during vitrinite maturation KEITH N. SiRCOMBE: Quantitative comparison of large sets of geochronological data using multivariate analysis: A provenance study example from Australia YAN LIANG: Dissolution in molten silicates: Effects of solid solution W. VAN WESTRENEN, N. L. ALLAN, J. D. BLuNDy, J. A. PuRTON and B. J. Woop: Atomistic simulation of trace element incorporation into garnets—comparison with experimental garnet-melt partitioning data TipoR GASPARIK: Evidence for immiscibility in majorite garnet from experiments at 13-15 GPA A. P. MgesHik, K. KEHmM and C. M. HoHENBERG: Anomalous xenon in zone 13 Okelobondo May (Vol. 64, No. 10) Volume 64, Number 10 May 2000 Articles KUILIAN TANG, XIAHONG FENG, and Grecory J. EtrL: The variations in 5D of tree rings and the implications for climatic reconstruction puters 1663 JAMES R. Rustab, Davip A. Dixon, and ANDREW R. FELMy: Intrinsic acidity of aluminum, chromium (IIT) and iron (III) 2,-hydroxo functional groups from ab initio electronic structure calculations Tires cicenns Sew MICHAEL G. SIEMANN and MICHAEL SCHRAMM: Thermodynamic modelling of the Br partition between aqueous solutions and halite 1681 FLORIAN BOuM, MICHAEL M. JOACHIMSKI, WOLF-CHRISTIAN DULLO, ANTON EISENHAUER, HELMUT LEHNERT, JOACHIM REITNER, and GERT WoORHEIDE: Oxygen isotope fractionation in marine aragonite of coralline sponges ... coos To GRETCHEN E. BATH, SIMON R. THORROLD, CYNTHIA M. Jones, STEVEN E. CAMPANA, JAMES W. McLaren, and JosepH W. H. Lam: Strontium and barium uptake in aragonitic otoliths of marine fish HirosH! AMAKAWA, Dia Sotto ALIBO, and YOSHIYUKI Nozaki: Nd isotopic composition and REE pattern in the surface waters of the eastern Indian Ocean and its adjacent seas CaRMEN Enip Martinez and Murray B. McBripe: Aging of coprecipitated Cu in alumina: Changes in structural location, chemical form, and solubility E. M. GAtimov: Carbon isotope composition of Antarctic plants JoseF P. WERNE, David J. HOLLANDER, ANKE BEHRENS, PHILIPPE SCHAEFFER, PIERRE ALBRECHT, and JAAP S. SINNINGHE DaMSTE: Timing of early diagenetic sulfurization of organic matter: A precursor-product relationship in Holocene sediments of the anoxic Cariaco Basin, Venezuela R. J. BAKKER and L. W. DiamMonp: Determination of the composition and molar volume of H,O-CO, fluid inclusions by microthermometry AipDA AWAD, A. F. KOsTER VAN Groos, and STEPHEN GUGGENHEIM: Forsteritic olivine: Effect of crystallographic direction on dissolution kinetics T. DRiESNER and T. M. Sewarpb: Experimental and simulation study of salt effects and pressure/density effects on oxygen and hydrogen stable isotope liquid-vapor fractionation for 4-5 molal aqueous NaCl and KCI solutions to 400°C D. A. BANKs, R. GREEN, R. A. CLiFF, and B. W. D. YARDLEY: Chlorine isotopes in fluid inclusions: Determination of the origins of salinity in magmatic fluids James H. Crocket: PGE in fresh basalt, hydrothermal alteration products, and volcanic incrustations of Kilauea volcano, Hawaii Haiso Zou and ALAN ZINDLER: Theoretical studies of 7*°U-**°Th-??°Ra and 7*°U-?'Pa disequilibria in young lavas produced by mantle melting JAMES FARQUHAR, TERESA L. JACKSON, and MarK H. THIEMENs: A *°S enrichment in ureilite meteorites: Evidence for a nebular sulfur component June (Vol. 64, No. 11) Volume 64, Number 11 June 2000 Articles ALESSANDRO AIUPPA, PATRICK ALLARD, WALTER D’ ALESSANDRO, AGNES MICHEL, FRANCESCO PARELLO, MICHEL TREUIL, and MARIANO VALENZA: Mobility and fluxes of major, minor and trace metals during basalt weathering and groundwater transport at Mt. Etna volcano (Sicily) STEPHEN A. SKRABAL, JOHN R. Donat, and Davip J. Burpice: Pore water distributions of dissolved copper and copper-complexing ligands in estuarine and coastal marine sediments BERND WENZEL, CHRISTOPHE LECUYER, and MICHAEL M. Joacuimski: Comparing oxygen isotope records of Silurian calcite and phosphate—5'*O compositions of brachiopods and conodonts Ropert H. Byrne and Yu-Ran Luo: Direct observations of nonintegral hydrous ferric oxide solubility products Ko = [Fe**}[H*]"**° G. J. M. VersTeEGH, J. H. F. JANSEN, J. W. De Leeuw, and R. R. SCHNEIDER: Mid-chain diols and keto-ols in SI Atlantic sediments A new tool for tracing past sea surface water masses? TeRJE HOLTEN, BJORN JAMTVEIT, and PAUL MEAKIN: Noise and oscillatory zoning of minerals PauL W. O. Hoskin: Patterns of chaos: Fractal statistics and the oscillatory chemistry of zircor B. G. Potyak, I. N. ToLstIKHIN, I. L. KAMENSKy, L. E. YAKOVLEV, B. Marty, and A. L. CHEesHko: Helium isotopes, tectonics and heat flow in the Northern Caucasus SMAIL MOSTEFAOUI, CLAUDE PERRON, ERNST ZINNER, and GERARD SAGON: Metal-associated carbon in primitive chondrites Structure, isotopic composition, and origin BERNHARD PEUCKER-EHRENBRINK and GREG RAvizza: The effects of sampling artifacts on cosmic dust fl IX estimates A reevaluation of nonvolatile tracers (Os, Ir) 1965 KAZUSHIGE TOMEOKA and ITARU TANIMURA: Phyllosilicate-rich chondrule rims in the Vigarano CV3 chondrite Evidence for parent-body processes S. SAHUPAL, J. N. Goswami, and A. M. Davis: K, Mg, Ti and Ca isotopic compositions and refractory trace element abundances in hibonites from CM and CV meteorites: Implications for early solar system processes 1989 Book Reviews ANDREAS LuTTGE: Book Review Announcements Papers to Appear in Forthcoming Issues June (Vol. 64, No. 12) Volume 64, Number 12 June 2000 Articles CrayYTON J. Yapp: Climatic implications of surface domains in arrays of 5D and 6'°O from hydroxy! minerals: Goethite as an example eer kiaere :, 2009 LIYUAN LIANG, ANNETTE HOFMANN, and BAoHuA Gu: Ligand-induced dissolution and release of ferrihydrite colloids 2027 M. Stein, A. STARINSKY, A. AGNON, A. Katz, M. Raas, B. Spiro, and I. ZAK: The impact of brine-rock interaction during marine evaporite formation on the isotopic Sr record in the oceans: Evidence from Mt. Sedom, Israel 2039 PETER BLOKKER, STEFAN SCHOUTEN, JAN W. DE Leeuw, Jaap S. SINNINGHE DAMSTE, and HERMAN VAN DEN ENDE: A comparative study of fossil and extant algaenans using ruthenium tetroxide degradation FRANCOIS Bobet and Urs ScHARER: Evolution of the SE-Asian continent from U-Pb and Hf isotopes in single grains of zircon and baddeleyite from large rivers HirosHi HIDAKA, and FRANCOIS GAUTHIER-LAFAYE: Redistribution of fissiogenic and non-fissiogenic REE, Th and U in and around natural fission reactors at Oklo and Bangombé, Gabon 2093 Davip R. BELL and PHILLIP D. IHiINGER: The isotopic composition of hydrogen in nominally anhydrous mantle minerals 2109 D. R. Hi_ton, C. G. MAcPHERSON, and T. R. ELtiotr: Helium isotope ratios in mafic phenocrysts and geothermal fluids from La Palma, the Canary Islands (Spain): Implications for HIMU mantle sources DoNnaLD D. BoGarD, DANIEL H. GARRISON, and Timotuy J. McCoy: Chronology and petrology of silicates from IIE iron meteorites Evidence of a complex parent body evolution J. R. Beckett, S. B. Simon, and E. SToLper: The partitioning of Na between melilite and liquid: Part Il. Applications to Type B inclusions from carbonaceous chondrites Harry Y. McSween, Jr. and KLAus KEIL: Mixing relationships in the Martian regolith and the composition of globally homogeneous Comment and Reply WoLFGANG HUMMEL: Comment on “On the influence of carbonate in mineral dissolution: 1. The thermodynamics and kinetics of hematite dissolution in bicarbonate solutions at T = 25°C” by J. Bruno, W. Stumm, P. Wersin, and F. Brandberg J. Bruno and L. Duro: Reply to W. Hummel’s comment on and correction to “On the influence of carbonate in mineral dissolution: 1. The thermodynamics and kinetics of hematite dissolution in bicarbonate solutions at T = 25°C” by J. Bruno, W. Stumm, re ee rer Pee eT ee eer ee re rer re rer Pe error ee Announcements July (Vol. 64, No. 13) Volume 64, Number 13 July 2000 Articles W. G. Liu, Y. K. X1ao, Z. C. Penc, Z. S. AN and X. X. HE: Boron concentration and isotopic composition of halite from experiments ee ks ne ra ee ae he oe .c ha Wi heh a ee a WEEE SRR eee perce M. FayYekK and T. K. Kyser: Low temperature oxygen isotopic fractionation in the uraninite-UO,—CO,—H,O system A. PANAHI, G. M. Youn, and R. H. RAinBirD: Behavior of major and trace elements (including REE) during Paleoproterozoic pedogenesis and diagenetic alteration of an Archean granite near Ville Marie, Québec, Canada ................. H. Bao, P. L. Kocu, and M. H. THIEMENS: Oxygen isotopic composition of ferric oxides from recent soil, hydrologic, and marine NEE stv gecasc cease een be PRO ae Need aN Sees WARE Cake Sena mab eN Amico 6 we nbs Ghd J. Crusius and J. THomMson: Comparative behavior of authigenic Re, U, and Mo during reoxidation and subsequent long-term burial I ans aac cee calwaeh (ude aoe ae aoa Chee See eae ee ae eee Fe ee ee T. SCHALLER, J. MorForD, S. R. EMERSON, and R. A. FeeLy: Oxyanions in metalliferous sediments: Tracers for paleoseawater metal DEE 2630080 cnu wnewens ean case wcenika dee 3 S. Metz and J. H. TREFRy: Chemical and mineralogical influences on concentrations of trace metals in hydrothermal fluids J. VILLANUEVA and D. W. HastinGs: A century-scale record of the preservation of chlorophyll and its transformation products in I og ath Grail kin glider aKa aca hk WOR aa wh Ke © ae NR Aw Sai I. GUNNARSSON and S. ARNORSSON: Amorphous silica solubility and the thermodynamic properties of H,SiO{ in the range of 0° to ME sad cnnta iw avewad esw aneen S. A. Morse: Linear partitioning in binary solutions A. A. GuRENKO and H.-U. SCHMINKE: S concentrations and its speciation in Miocene basaltic magmas north and south of Gran Canaria (Canary Islands): Constraints from glass inclusions in olivine and clinopyroxene .............. L. T. ELkins, V. A. FERNANDES, J. W. DELANO, and T. L. Grove: Origin of lunar ultramafic green glasses: Constraints from phase ES tials ak ata nt Wb A widbnele as 6 Re heh aap Rete DeM eC eRe Uae F. A. Poposek, R. H. NicHo.s, Jr., J. C. BRANNON, B. S. Meyer, U. Ort, C. L. JENNINGS, and N. Luo: Potassium, stardust, and the last supernova Announcements July (Vol. 64, No. 14) Volume 64, Number 14 July 2000 Presidential Address M. J. Drake: Accretion and primary differentiation of the Earth: A personal journey